WOuld it be possible to fit a 4" speaker, or components, in the dash? It does look like you could add an extra half inch larger speaker in there. It also looks like there is room for a 1" tweeter to be flush mounted to the grille. Would it even be worth it if I am upgrading my entire system? I would like the tweet in the dash to match the comps I plan on putting in the doors.

I was contemplating the same thing -- as one can buy much higher-performing 4" speakers vs. 3.5", and a 4" will sound much better. However, it seemed pretty tight in there to me. IIRC, depth is limited as well. All the heating/AC/Defrost dusting is right there. I didn't want to mess with that airflow. If you successfully do it, please let us know. 4" would be so much better.

I started looking in to this to see if I could fit a 4 inch in the dash too.

I pulled out the speaker and took some measurements. The depth of the area is 1.858" and the factory opening at the narrowest point is 3.122".

As I was looking at the 100KRS which has a cutout of 3 11/16" and a total diameter of 4.01575, I made these cutouts in the photos as close as possible to see how much cutting I would need to do and if the top of the speaker would fit. Not sure if this helps anyone else. Depth wise there wouldn't be an issue with this speaker.

It does look like the factory opening can be trimmed to fit the cutout requirements of most 4" speakers, but in order to get the top of the speaker to fit, the very corner/edges of the defroster vents would need to be trimmed down.

Do you plan on installing a DSP as part of your install? Asking because everything I've read says that you will need one to fully take advantage of the center channel...using time alignment.

My center will stay stock and run off the factory amp until I / if I decide to add a DSP.

Greetings,

Remember, the stock dsp built-in to the factory amp controls the surround sound steering logic and time alignment, etc. You can piggy back another dsp and play with the settings to achieve your preferred sound. The 2-channel matrix has already been created in the Alpine Amp. The key for the front stage is to properly balance the tweeters and center channels to create that front stage using the windshield to your advantage. Then bring in the mid-bas/midrange woofer to find the balance to all 5 speakers. You have spend time with crossover settings to find what you are looking for. Also, you might have to go back to the time alignment for fine tuning as well. This way many experienced shops will spend any were from 2 - 4 hours with the initial tuning. And after the new speakers break-in, then they will fine tune again.

I do recommend that if you add another DSP to get rid of the super excellent stock speakers, at least for the fronts. Always look for speakers that have excellent off-axis delivery, especially in a car surround sound environment.

Remember, the stock dsp built-in to the factory amp controls the surround sound steering logic and time alignment, etc. You can piggy back another dsp and play with the settings to achieve your preferred sound. The 2-channel matrix has already been created in the Alpine Amp. The key for the front stage is to properly balance the tweeters and center channels to create that front stage using the windshield to your advantage. Then bring in the mid-bas/midrange woofer to find the balance to all 5 speakers. You have spend time with crossover settings to find what you are looking for. Also, you might have to go back to the time alignment for fine tuning as well. This way many experienced shops will spend any were from 2 - 4 hours with the initial tuning. And after the new speakers break-in, then they will fine tune again.

I do recommend that if you add another DSP to get rid of the super excellent stock speakers, at least for the fronts. Always look for speakers that have excellent off-axis delivery, especially in a car surround sound environment.

Best for now.

Agree with you 100% - if I were to add a DSP, it would be the last piece of the puzzle. I should have elaborated on my plans for the truck.

1) replace head unit: done, I had an avic from my old car which is now in the jeep.

2) front stage: alpine pdx-v9 amp and new comps up front. I have a pair of Hertz ESKs from my old car that I'm trying to sell. Once sold, I'm looking at either Hertz HSKs or Focal PS 165. I like the fact that The Focals come with separate crossovers for the tweets and mids....an easy active setup. The rears and center will continue to run off of the factory amp.

3) add a sub.

4) tune, tune and tune again.

Steps 2 & 3 will happen at the same time, once I can scrape together the funds.

Noticed you're in / around NYC - do you know of any shops that can tune a system properly using an RTA? I've played with the JBL MS8 and didn't care for the auto tune and quite frankly don't have the know how or patience to tune an active setup myself.

Noticed you're in / around NYC - do you know of any shops that can tune a system properly using an RTA? I've played with the JBL MS8 and didn't care for the auto tune and quite frankly don't have the know how or patience to tune an active setup myself.

Greetings,

Their is a shop in Lynbrook, Nassau Country at 237 Merrick Road, UltraSounds of New York. Try them first or, Avenue Sounds at their Freeport shop.

If you are going with a DSP, run the entire front stage (including the center) and sub active. It makes a large difference with the Hertz speakers.

If you have read my posts are the audio forum, I am going to use the factory DSP just for the surround sound steering logic and another DSP for all other functions. I was thinking of the JBL, but I did not like the reviews plus the fact it is a closed system. I looking again at the Arc Audio PS-8 and the Alpine PXA-H800 to create a hybrid 7.1 setup. The leading choice right now is the 3.sixty.3

I just recently put new tires on the JGC, so I have to stack up some more bucks before I start mine.

Their is a shop in Lynbrook, Nassau Country at 237 Merrick Road, UltraSounds of New York. Try them first or, Avenue Sounds at their Freeport shop.

If you are going with a DSP, run the entire front stage (including the center) and sub active. It makes a large difference with the Hertz speakers.

If you have read my posts are the audio forum, I am going to use the factory DSP just for the surround sound steering logic and another DSP for all other functions. I was thinking of the JBL, but I did not like the reviews plus the fact it is a closed system. I looking again at the Arc Audio PS-8 and the Alpine PXA-H800 to create a hybrid 7.1 setup. The leading choice right now is the 3.sixty.3

I just recently put new tires on the JGC, so I have to stack up some more bucks before I start mine.

Best for now.

Thanks for all the info, I’ve actually been to Avenue Sounds in Freeport and will try UltraSounds.
As for the DSP, I'm leaning towards the Bit TenD but have heard great things about the PS8....but I won't be getting a DSP for quite some time.

I have. Quite a bit of trimming, trial and error, and research to get one to fit. First tried the JBL P462 since it had the right mounting depth and the smallest cutout requirement for 4inch speakers I could find. However the magnet was too wide and hit the plastic a bit in an area at the bottom that couldn't be trimmed. I actually got the cover on with it, but it was sitting on the magnet and not mounted which I didn't like. I then got the JL C2 4 inch and it fits but don't love the sound and doesn't come close to matching the Focals I have.

I'm still waiting for a better option but for now that's what fits. I think the Focal 100KRS woofer would fit but I don't have a place for the crossover or know where to mount the tweeter.

I have. Quite a bit of trimming, trial and error, and research to get one to fit. First tried the JBL P462 since it had the right mounting depth and the smallest cutout requirement for 4inch speakers I could find. However the magnet was too wide and hit the plastic a bit in an area at the bottom that couldn't be trimmed. I actually got the cover on with it, but it was sitting on the magnet and not mounted which I didn't like. I then got the JL C2 4 inch and it fits but don't love the sound and doesn't come close to matching the Focals I have.

I'm still waiting for a better option but for now that's what fits. I think the Focal 100KRS woofer would fit but I don't have a place for the crossover or know where to mount the tweeter.

Not too many 4inch coaxials with small enough magnets.

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Can you make a small mounting baffel to get the speaker off of the plastic piece and still allow it to be sealed? Also, if that wont work what about the JBL GT0328 or 329 3.5" speaker? Wouldnt that work? or would they not sound the same?